One microcoulomb equals

One microcoulomb equals

• A. 1 x 10^-3 C
• B. 1 x 10^-6 C
• C. 1 x 10^-9 C
• D. 1 C

Answer: (B)

Understand how metric prefixes relate to the coulomb. The prefix micro (μ) means 10^-6, so one microcoulomb is one millionth of a coulomb. That makes 1 μC = 1 x 10^-6 C. Seeing the other options helps check consistency: 1 x 10^-3 C is a milli- prefix, which is 0.001 C (1000 μC); 1 x 10^-9 C is nano (0.000000001 C, or 0.001 μC); and 1 C is the base unit with no prefix. So the quantity that equals one microcoulomb is 1 x 10^-6 C.

Understand how metric prefixes relate to the coulomb. The prefix micro (μ) means 10^-6, so one microcoulomb is one millionth of a coulomb. That makes 1 μC = 1 x 10^-6 C.

Seeing the other options helps check consistency: 1 x 10^-3 C is a milli- prefix, which is 0.001 C (1000 μC); 1 x 10^-9 C is nano (0.000000001 C, or 0.001 μC); and 1 C is the base unit with no prefix. So the quantity that equals one microcoulomb is 1 x 10^-6 C.